package Task27;

import java.util.Scanner;

public class Main2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while (scanner.hasNextDouble()){
            double a = scanner.nextDouble();
            double b= scanner.nextDouble();
            double c= scanner.nextDouble();
            isTriangle(a,b,c);
        }
    }
    public static void isTriangle(double a,double b ,double c){
        if(a == 0 || b == 0 ||  c == 0){
            System.out.println("No");
        }
        if(a+b > c && a+c > b && b+c > a){
            System.out.println("Yes");
        }else {
            System.out.println("No");
        }
    }
}
